Sucker-rod elevator



W; H. BURSTALL AND W. ADAMSON. SUCKER HOD LEVATOH.

APPLICATION HLEDVluNEzs, 1919.

Patented May 25,1920.

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J2' 21 oRJ WIM/ESSEJ Mlam ZJ/A d OWS mgefygdowog Byzladf v ATTORNEY W. H. BURS'TALL AND W. ADAMSON.'

SUCKEH ROD ELEVATOR.

APPLICATION msn JUNEzs, 1919.

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sUcxEa-'non ELEvA'ron.

Specification o! Letters Patent.

Application 'led June 28, 1919. Serial No. 307,318.

i Elevator, of which the following is a speci cation.

This mventlon relates to means for ralsing Vand lowering sucker rods into and out of artesian and oil wells.

An object of this invention is to provide an elevator which can be easily and quickly attached to and detached froml the sucker rod to be raised or lowered.

Another obj ect of our invention is topro- 'vide a semi-automatic latching means for sucker rods, whichv latching means will endure excessive strain and which will not loosen or release the sucker rod when 4the elevator is in operation.

A further object of this invention is t6 provide a sucker rod elevator of this character which will be adapted for attaching orddetaching the same to or from a'moving ro f A further object of this invention is to provide a\4 sucker rod elevator of the char;

acter-referred to which will be simple and 30v rapid in operation and strong and durable in construction.

Other objects and advantages will appear from the detailed subjoined description, it being understood. that while we will hereinafter set forth a preferred form of our invention the same is not limited to such preferred forml but contemplates'changes in the details of construction, proportion and size thereof.

The accompanying drawings illustrate the invention.

' Figure 1 is a perspective view of an elevator built in accordance with the provisions lof this invention illustrating the elevator as applied to a sucker rod.

Fig. 2 .is a front elevation of the same with the bailbroken away.

vF ig. Bis a top plan view of the same withY the bail broken away.

Fig. 4 is a vertical section'taken on the line indicated by l-m in Fig. 3.

Fig. 5 is a view similar to that in Figf-, except that the cover plate is removed, i lustrating the latch in locked position.

Fig. 6 is a view similar to Fig. 5 except that the latch is in open position.

latch mechanism` receiving recess 9.

Fig. 7 is a top plan view of the elevator body with the latch mechanism and slide removed. j

Fig. 8 is a vertical section taken on the line indicated by aes-m8 in Fig. 6.

Fi 9 is a vertical section taken on the line indicated by g-'g in F ig. 3.

Fig. 1() is a perspective view of the slide for'our elevator.

Fig. 11 is a perspective view of one ofthe latch members of our elevator.

The elevator comprises a body 1 which is provided at opposite edges with gudgeons 2, which form pivots engaging the bearings 3 of a bail 4. The body 1 is formed with a rod'receiving way, or slot 5, which .way extends from the center 'of the body 1 and has parallel side walls 6 terminating in outwardly diverging portions 7 The inner end of the way 5 is preferably curved in a semicircular manner, as at 8, to form a bearing for asucker rod. V

The upper portion of the body 1 is cut away, as illustrated in Fig. 7, to provirrileha e recess 9 is formed with parallel side walls 10 which extend to the periphery at the rear of the body 1 and which communicate at their forward ends with outwardly diverging portions 11, the latter forming seats for a purpose hereinafter referred to. The boundary of the recess 9 is completed by the rvwalls 12 which extend from the seats 11 to the apex of the walls 6 and 7 of the slot 5.

A rib 13l is formed at the rear of the bodyV 1 intermediate the sides 10 of the recess 9 and is reduced as at 14 adjacent the` said sides 10, which reduced portions 14 form rectangular guideways for ,a purpose hereinafter referred to.

'A pair of jaws 15 is provided with overlapping and underlapping ears 16 which are pivoted by a pivot rod 17 mounted within a bore 18 formed Within the body 1, which bore is situated intermediate the rib 13` and the inner en d of they slot 5. Each `of the jaws 15 is formed in its inner edge with a semicircular recess 19, which recesses adjoln to form a clrcular bearing for a sucker rod, when the jaws are in latched position as illustrated Fig.- 3. j

The jaws 15 are provided with fiat outer edges 20, which edges 20 are in parallel relation with the sides 10 of the recess 9 when the jaws are in latched position as illustrated in Fig. 5.

Patented May 25, 19:20;`

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The forward ends of the jaws 15 are provided with shoulders 21 between which and the seats 11 are positioned coil springs 22. AThe springs 22 tend to maintain the jaws 15 in vthe latched position illustrated in Fig. 5. The shoulders 21 are so formed that when the jaws 15 are in the latched position illustrated in Fig. 5 the inner faces 23 of the shoulders 21 coincide with 'the sides 6 of the way 5.

The inner edges of the jaws 15 diverge outwardly at 24 so that contact of the said diverging faces 24 with a sucker rod will forcethe jaws 15 ,apart to receive the rod. Lugs 5 are positioned adjacent the edges 6 of he slot 5 and adapted to limitthe movement of the j aws'15 by engaging with the said jaws at the end of recesses 26 formed therein.

The parallel rods 27 of a U-shaped slide 28 are slidably received within the rectangular guideways- 14 and are adapted to engage the side walls 10 of the recess 9 and the flat outer edges 20 .of the jaws 15 to lock the jaws in latched position as illustrated in Fig. 5. The transverse portion 29 of the slide 28 forms a grip for manipulating the slide. The ends of the rods 27 are provided with lugs 30 which are adapted to engage the reduced portions of the rib .13 to limit the outward movement of the slide 28. The inward movement of the slide 28 is limited by abutments 31 which are adapted to engage the outer edge of the reduded portions of ,the rib 13. The slide 28 is secured against the initial outward movement when in the latched position illustrated in Fig. 5 [by means-of depressions 32 formed in the rods 27 adjacent the abutments 31, which depressions receive balls 33 carried by coil springs 34, thelatter being mounted within. recesses 35 formed in the rectangular guideways 14.

The latch mechanism above described i s held within the recess 9 by means of 4a cover 36. The cover 36 has the same general outline as the top of the body 1 and is formed with a rod receiving way 37 corresponding with the rod receiving way 5 and is preferably formed at its end with a 'circular curve 38 of larger diameter thanthe circle -forined by the recesses 19 of thejaws 15 when the jaws are in latched position. As a protectionto the slide 28 the body 1 and thecover36 may be provided with-guards 39:

r1 he preferred form df our invention illustrated in the drawings is adapted to be readily assembled as follows:

The .pivot rod 17 is inserted through the ears 16 of the jaws 15 and the jawsf mounted within the body 1 by-forcing the pivot rod 17 into the bore 18. The coil springs 22 are inserted between' the shoulders 21 of the jaws 15 and the seats 11 of the recess 9. The coil springs 34 are mounted within the 'recesses 35 formed in the rectangular guideways 14 and the balls 33 mounted thereon. The slide 28 is then positioned with its parallel rods 27 mounted within the rectangular guide'ways 14. The cover 36 is then mounted on the body 1 by suitable securing means 40. It is to be noted that the latching mechanism of the preferred form of our invention requires 'no bolt, screw or other securing means in assembly other than the cover retaining means referred to.

In operation our invention provides a`distinct advance over the yprior art in its silnplicity and rapidity of operation. Our elevator is applied to the casing rod by withdrawing the slide 28 and forcing the sucker rod against the jaws 15 as illustrated in Fig. 6. The contact of the rod and jaws 15 will then spread the jaws apart. Similarly with Vthe slide 28 in open position a pull by the 28 may be performed bythe operator with one hand, thus allowing the elevator to be attached or released with great rapidity and ease.

The elevator may thus be applied to either a stationary or moving .rod and c'an likewise be released from such.

yFurthermore the relation of parts is such that our elevator is extremely durable in construction and constitutes a maximum safeguard against accidental loosening of4 the rip upon a suspended sucker rod.

e claim: f 1. A sucker rod elevator' comprising a bail,a body connected to said bail having a radially extending rod receiving way, shiftable latch means to secure a rod within said way, and a slide to secure said latch means in latched position.

2. A sucker rod elevator comprising a bail, a body connectedto said bail having a radially extending-rod r ceivin' way, shiftable latch means to secure a rod1 within said way, said-latch means being adapted to be opened by the pressure of afrod when the elevator is applied to or removed from the same, and a shiftable member to lock said latch means in latched position.

3. A sucker Aroel elevator comprising a bail, a body connected to said bail having a radially extending rod receiving way, latch means yadapted to secure a rod within said way, and a wedge member adapted to lock said latch means in latched' position.

4.. In a sucker rod elevator the combination of a body having a radially extending `rod receiving way, shiftable jaws and a wedge member adapted to lock said jaws in latched position to secure a rod lwithin the elevator. l

5'. In a sucker rod elevator the combination of jaws adapted to be opened by a rod, and a wedge member adapted to lock said jaws in latched position to secure a rod within the elevator. i

6. In a sucker rod elevator the combination of a bail, a'body connected to said bail and provided with a rodway, jaws pivoted to said body, and a wedge adapted to lock said jaws in latched position to secure a rod within said way.

7. In a sucker rod elevator the combination of a bail, a body connected to said bail having a rod receiving recess, means to secure a rodiwithin'said way, said means being adapted to be-opened by the pressure of the rod when the elevator is' applied to or removed from a rod,and means to secure said last named means in locking position.

8. In a sucker rod elevator the combina tion of movable aws adaptedtolock-a rod within said elevator, said aws being adapted to be opened by the pressure of the rod when the elevator is applied to or removed from a rod, and means to secure said jaws in closed position.

v9. In a sucker rod elevator the combination of a body having a rod receiving way,4 shiftable latch means to secure a rod within said way, and shiftable means to secure said latch means in latched position. 10. In a sucker rod elevator' the combination of a bail, a body connected to said bail and having a radially extending rod receiving way, movable jaws mounted in said body, and a wedge. member to, secure said j `jaws in closed position'to prevent the passage of' a rod through said way.

11. Ina sucker rod elevator the combination'of a bail, a bodyconnected to said bail,

j .having a rod receiving way, movable jaws adaptedto secure a rod within said way, andk l a U-sliaped slide adapted to lock said jaws in closed position.

13. In a sucker rod elevator the combination of a bail, a body connected to said bail having a rod receivingway, pivoted jaws adapted to secure a rod within said way, and a U-shaped slide adapted to engage said jaws to lock the same in closed position.

14. In a sucker rod elevator, the combination'of a bail, a body connected to said bail, said body having a rod way and a latch mechanism receiving recess, ,movable jaws adapted to secure a rod within said way, coil springs .inserted between said jaws and the walls of said recess to yieldably hold said jaws in closed position, and a slide,-

member engaging said jaws to hold said jaws in closed position.

15. In a sucker rod elevator the combination ofa bail, a body connected to said bail having a radially extending rod receiving way, and aws having semicircular meeting faces adapted to adjoin to form a circular closure for a rod in said way.

16. In a sucker rod elevator the combination of a bail, a body connectedv to said bail having a rod receiving way, movable jaws having semicircular meeting faces adapted to adjoin to form acircular closure for a rod in said way, means to releasably hold said jaws in closed position, and means to lock said jaws in closed position.

' 17. In a sucker rod elevator the combination of a bail, a body connected to said bail having a rod receiving way, movable jaws adapted to secure a rod within said way, said` jaws having outwardly diverging faces for engagement with a rod to open said jaws, and shiftable means to secure said jaws in closed position.

. 18. In a sucker'rod elevator, the `combination of a bail, a body connected to said bail, said body having a rod 4receiving wa a recess formed on one face of said a,bo y with side walls, movable jaws pivoted within said .roo

recess adapted to prevent the passage of a rod through said way, and a slide adapted to wedge between said jaws and saidside walls to secure said jaws in locked position. In testimony whereof we have .hereunto setour hands at Oxnard, California, this 20th day of June, 1919. WILLIAM H. BURSTALL.

WALTER ADAMSON. In presence of v W. MARK DURLEY,

HENRY-C. DowNEs. 

